Honestly, it depends. Didn't mind it in We, Without Wings because it was already so random a lot of the time to begin with.

However, now that I've had time to think about it I think over the top ecchi stuff/fan service is one of the reasons I didn't like A Bridge to the Starry Skies as much as I would have otherwise. Hard to take serious parts, well seriously, when you have 10 minutes of boobs bouncing around before hand.

Have only seen the first episode of High School of The Dead but that was one of the reason I didn't like it, either.